LG

LG Ultragear 39GX900A-B 39 OLED Curved WQHD Gaming Monitor - 240Hz 0 03ms G-SYNC FreeSync Premium Pro HDMI

$949.99

1407+ bought in the past month

About this item

  • The 240Hz OLED Gaming Monitor That’s Ahead of the (800R) Curve — 39" WQHD OLED with a steep 800R curve and up to 1300-nit (APL 1.5%) peak brightness pulls you into the action; 240Hz and 0.03ms (GtG) keep gameplay fast and fluid.
  • Up to 240Hz & 0.03ms – Outrageous OLED Gaming Speed — Respond faster and track targets with near-instant pixel transitions that cut lag and ghosting for competitive play.
  • Ultimate Frame Sync: FreeSync Premium Pro & G-SYNC Compatible — Tear-free, stutter-free visuals across PC and next-gen consoles for consistently smooth frames.
  • Bright Picture, Deep Blacks, Brilliant Detail — OLED delivers up to 98.5% DCI-P3, 1.5M:1 contrast, and DisplayHDR True Black 400 for cinematic color and shadow detail.
  • The 800R Curve: Surround Yourself in the Action — A dramatic 800R wrap enhances peripheral vision for deeper immersion in every scene.
  • Low Glare, More Focus — An anti-glare OLED surface helps minimize reflections so you can stay locked on every objective and every win.
  • Unlock Your Potential with Advanced Gaming Tools — Dynamic Action Sync, Black Stabilizer, FPS Counter, and Crosshair give you real-time advantages and precision.
  • Serious Connectivity for Serious Gamers — HDMI 2.1, DisplayPort 1.4, and USB Type-C with up to 65W power delivery support high-res, high-frame gameplay and single-cable setups.
  • Battlestation Upgrade, Adjustable to Gamer Specs — Virtually borderless 39" OLED with height/tilt/swivel stand and RGB hexagonal backlight to match your setup.
  • OLED Protection: 2-Year Limited Warranty & Panel Care Tools - Rest easy knowing your OLED monitor is built to last. The 2-year limited warranty covers key components, including the OLED panel. And OLED Care tools such as pixel cleaning keep your display sharp, for reliable top-tier performance. Please see Warranty Information on this page for all warranty details.
$949.99

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Product details
BrandLG
Screen Size39 Inches
ResolutionQHD Ultra Wide 1440p
Aspect Ratio21:9
Screen Surface DescriptionMatte
Technical specifications
product_dimensions12.72 x 34.96 x 23.86 inches
item_weight25.3 pounds
manufacturerLG
item_model_number39GX900A-B
best_sellers_rank#17,229 in Electronics ( See Top 100 in Electronics ) #438 in Computer Monitors
date_first_availableMarch 11, 2025
standing_screen_display_size39 Inches
aspect_ratio21:9
resolution3440 x 1440 Pixels
image_brightness275 Candela per Square Meter
total_usb_ports1

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Customer reviews

4.3186 ratings
  1. 571%
  2. 414%
  3. 30%
  4. 20%
  5. 114%

Customers say

Customers find the monitor feels high quality and appreciate its 39-inch size, perfect black levels, and curved design that draws them in.

★★★★★

Great Monitor for 1440p

BenDecember 23, 2025

The 39 inch size was perfect for me personally. Didn’t feel too big for a desk but was so immersive. Color quality is exceptional and the monitor feels high quality. I also found that when I played games that had to be played in a 16:9 format, it still looked good on the monitor. The internal speakers are also unexpectedly good and has a nice depth effect. Read more

★★★★★

Best monitor I have ever used.

PennDecember 20, 2025

Best monitor I have ever used by far. Perfect black levels, amazing colors, no dead pixels. A year or more later it is still awesome. The alleged cons-- that it doesnt get that bright, or that it has low pixel density-- are not very evident and I dont notice them nearly as much as I thought I would. What I do notice is that my games look incredible. Read more

★★★★★

Honestly the best monitor i've ever owned

CustomerJuly 18, 2025

Either I won the panel lottery or this is just a great monitor. I've bought many cheap and expensive monitors and never had one so perfect out the box. Time will tell though. Went from a 34" 3440x1440 to this 45" 3440x1440 very worried about bigger pixels, massive curve and the text on desktop being blurry but had nothing to worry about. You don't even notice the curve when your using it (look at your flat tv up close after using your monitor and you will think your tv is bulging outward, it's wild). Desktop text is obviously off but not as terrible as people made it seem. You can use this as a home office work computer and be fine with few adjustments maybe sharpness increase and clear type. Plenty of settings on this thing. MAKE SURE you use PIXEL CLEAN setting on monitor before you use it as it is recommended. Also take precautions about screen burn in. Gaming obviously is amazing on this thing. Ran a bunch of tests and it was all good. Solid design nothing over the top. Thinner than expected. Lights are cool. Speakers on this are in fact speakers (Didn't test speakers too much). Response time is insane but im not hardcore like that. My computer is mid to todays standards which is why I stuck with this resolution. I still like to run games on max settings, high fps and don't mind the resolution. Not blurry at all in game or desktop (except maybe the text being ever so slightly off). Maybe if you went from a higher resolution to this then maybe I can understand being a little put off. Plenty of other stuff I didn't mention. Read more

★☆☆☆☆

Defective Product + Very Poor Support

OsyedAugust 17, 2025

I bought this LG Ultragear OLED monitor and after a short time half of the screen stopped working. For such an expensive product, the quality is awful. What’s even worse is Amazon’s support. They refused to give me a refund, no return option, no replacement nothing. Instead of helping, they kept sending me to the manufacturer and wasting my time. Bad product, and Amazon didn’t stand behind the customer at all. Read more

★★★★★

Never play on anything else again!

Kindle CustomerDecember 28, 2025

I'm absolutely in love with this monitor! It completely changed the way that I game. Excellent value for the money cuz I got it on sale and the refresh rate and color accuracy are perfect. Brightness can be adjusted and quality could be set to whatever needs for the game. Come pre-installed with four settings; gamer one, gamer two, rts, FPS out of the box. Read more

★★★★☆

Great monitor , well built . Remote would be nice tho

ShawnNovember 30, 2024

Bought this for Xbox play . Been eyeing this and the Samsung ark 2 55” but for gaming decided to go with the smaller 45”. And when it finally hit a sale price I grabbed it . Monitor showed up in two days . Easy to assemble. Very sturdy materials . Aluminum not plastic . Has two hdmi and one display port for inputs . Not gonna lie maybe two display ports woulda been nice as well as an hdmi out or optical sound out but it is a pc monitor primarily by design . It does have an Audio 1/8th inch jack for headphones so gonna try that with a sound bar . This model has the square base. Most brick and mortar stores around me have the weird pyramid arms so I am glad I got the square base as it takes far less room on my desk . I do wish it came with a remote, having to enable PIP AND PBP via the button on the bottom to me isn’t ideal and I will be using this monitor in split screen for productivity as well but I’m sure I will get used to it . As for gaming . I’m primarily COD and FORZA. COD is amazing on this monitor . It truly helped my game play . And forza is very immersive in cockpit view inside the car . I still need to tweak and explore the monitor settings to optimize but really enjoying it so far and can’t beat the sale price Read more

Review image 1
★★★★★

For daily use it’s an awesome upgrade!

JamesDecember 6, 2025

The curve on this monitor is NOT bad at all. It’s been called “severe” among other things, but I use this as a daily monitor for work, streaming, some gaming, etc. so it’s all over the place on use cases. It was a noticeable improvement over a 32” monitor, and the added width makes a big difference (no pun intended). The DPI of 96 isn’t razor-sharp, but I’m not 4 inches from it looking for soft edges or gotcha disappointments. It’s fine so don’t worry about it. The text quality is as good as most others, and frankly isn’t a problem at all. If a pure text-displaying microfont monitor capable of competing with 5K is your requirement then look elsewhere. But if you want a fantastic big OLED with awesome black levels, smooth movements when gaming, and popping colors with zero bleed for mixed use then jump on it. Read more

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